docs:fix mysql table name

[zhengyansheng]

What type of PR is this? PR类型是什么？

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind api-change /kind bug /kind cleanup /kind deprecation /kind design /kind documentation

What this PR does / why we need it: 这个PR解决了什么问题:

Which issue(s) this PR fixes: PR相关联issue:

Fixes #

Does this PR introduce a breaking change?: PR带来的破坏性变更:

Test/Final result: 测试/最终运行结果: